Some of imei number only have 14 number or longer than 15 number.This tool use to calculate last number of imei number to check sum or validate imei. Final result is valid 15 imei number, you can copy and use.To find your IMEI number, type *#06# on the phone keyboard, or is located in the battery compartment.
Please enter the 15 digits, without any other character.

The Check Digit (calculated by manufacturer) is a function of all other digits in the IMEI.
The purpose of the Check Digit
is to help guard against the possibility of incorrect entries to the CEIR and EIR
equipment.

The check digit is validated in three steps:

Starting from the right, double a digit every two digits (e.g., 5 → 10).

Sum the digits (e.g., 10 → 1+0). Check if the sum is divisible by 10.

Conversely, one can calculate the IMEI by choosing the check digit that would give a sum
divisible by 10.